it's not a trigger but a restriction, like Peace in Our Time's inability to be played if the corp scored an agenda or all priority events as 'play as your first click'
but it's probably closer to Maxwell James' can only be used after a run on HQ or Political Operatives' 'can only be installed after a run on HQ'
'immediately' was clarified to mean the following paid ability window, so you can rez and trash and it's still 'immediately' after since it's in the same window
additionally, you can trigger multiple work crews in the same window
no erratum needed. we just needed a clarification what of what immediately meant, and we got it.